一、概述 在上讲开头曾经提到,钢的贝氏体转变属于共析分解的范畴,贝氏体是奥氏体中温分解的产物.在某些非铁合金中也有类似的转变和相应的组织,但本文仅限于讨论钢中的情况.钢的贝氏体组织因其发现者之一(Bain,贝茵)而得名。工业上利用贝氏体转交的原理而发展起来的贝氏体淬火法正日益广泛地应用于机械制造等部门,成为提高金属材料机械性能的重要热处理方法之一。因此,讨论钢中贝氏体的组织形态和转变机 I. INTRODUCTION I mentioned at the outset that the bainite transformation of steel belongs to the category of eutectoid decomposition and that bainite is the product of moderate decomposition of austenite and similar transformations and corresponding structures in some non-ferrous alloys , But this article is limited to the discussion of steel, whose bainitic structure is named after one of its discoverer (Bain). Bainite quenching method, which is developed industrially by the principle of bainite transfer, is increasingly used in machinery manufacturing and other departments and has become one of the important heat treatment methods for improving the mechanical properties of metal materials. Therefore, we discuss the bainite morphology and transformation in steel